Upgrade intel pentium d915?

I have a intel pentium D915 and was thinking of getting a newer processor.

The D915 is
Presler socket 775 running 65nm
2.8ghz pentium D
2mb l2 cache
fsb of 800mhz.

I was looking at getting a

Intel Core2 Duo E7500 Wolfdale 2.93GHz 3MB L2 Cache
Multi-Core Dual-Core
Name Core2 Duo E7500
Operating Frequency 2.93GHz
FSB 1066MHz
L2 Cache 3MB
Manufacturing Tech 45 nm

is it worth upgrading or will i not see much of a performance increase?
is there a better suggestion for a socket 775?

the only thing i typically do is play World of warcraft. I upgraded the video card to a 9600GT recently.

Have you verified that the 45nm Wolfdale will be compatible with the motherboard/chipset you have? AFAIK not all Intel 945/965 chipsets (commonly shipped with the old dual core P4s) will support Wolfdale.

-mcg

Ah yes. An Nvidia chipset. Looks like you should be set if you decide you want that upgrade.

-mcg

i5 will be a cheap alternative that should overclock well because of the new process and lack of hyper threading, but its pcie controller will only support 8x Xfire/SLI. This straight out of the mouth of an Intel rep who was relatively offended when I implied that this wasn't an intelligent decision. If you want performance for cheap get an x48 board and q9550. Then your can run SLI/ Xfire to your hearts content. And yes, going from a pentium D 820 @ 3.9GHz to a Core 2 Duo at 4 was a huge step up because of the entirely different architecture. Since then Ive gone to a Q6600 I traded for with one of the new Phenoms I won at quakecon which is currently at 3.35GHz and that was similarly a big step up in multitasking. ( My board wont allow me to put more than 1.4v through it as vcore adjustments are in 5% increments from the VID up to 15%, point being dont get a Biostar p43, ive got a new board coming soon as the Scythe Infinity Ive got keeps its 27c idle, 50c prime 95 )

All in all, go with what obsidian said. 775 prices are going to drop like a stone.